Jump to main content
Jump to site search

Issue 34, 2015
Previous Article Next Article

Amino-ether macrocycle that forms CuII templated threaded heteroleptic complexes: a detailed selectivity, structural and theoretical investigations

Author affiliations

Abstract

A new oxy(ether)tris(amine) macrocycle, MC has been synthesized for CuII complex formation within the cavity of the macrocyclic wheel in endotopic fashion. This complex is further reacted with the bidentate chelating ligands, 1,10-phenanthroline (L1), 2,2′-bipyridyl (L2), 4,4′-dimethyl-2,2′-bipyridyl (L3) and 5,5′-dimethyl-2,2′-bipyridyl (L4) to achieve the pseudorotaxanes PRT1–PRT4, respectively. These bis-heteroleptic complexes were characterized by the electrospray ionization mass spectrometry (ESI-MS), UV/Vis, EPR spectroscopy and Single-crystal X-ray structural analysis. Binding constants of the heteroleptic complexes were found in the range of 1.16 × 102 to 1.55 × 103 M−1 in acetonitrile. Further, the double level selectivity studies of MC using different metal ions [CoII, NiII, CuII, ZnII] and a number of simple bidentate chelating ligands shows the selective formation of PRT1 that justifies the self-sorting nature of the system. Further, substitution of axles from pseudorotaxanes PRT2–PRT4 could also be achieved by L1 with nearly 100% efficiency. To corroborate the experimental studies (comparison with the crystal geometry, importance of the π–π stacking, etc.) the geometries of the pseudorotaxanes were optimized using DFT (B3LYP) in the gas phase.

Graphical abstract: Amino-ether macrocycle that forms CuII templated threaded heteroleptic complexes: a detailed selectivity, structural and theoretical investigations

Back to tab navigation

Supplementary files

Article information


Submitted
10 Feb 2015
Accepted
23 Mar 2015
First published
23 Mar 2015

Dalton Trans., 2015,44, 15198-15211
Article type
Paper
Author version available

Amino-ether macrocycle that forms CuII templated threaded heteroleptic complexes: a detailed selectivity, structural and theoretical investigations

S. Santra, S. Mukherjee, S. Bej, S. Saha and P. Ghosh, Dalton Trans., 2015, 44, 15198
DOI: 10.1039/C5DT00596E

Social activity

Search articles by author

Spotlight

Advertisements